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The behavioral and endocrinological development of stress response in dogs
Author(s) -
Nagasawa Miho,
Shibata Yoh,
Yonezawa Akiko,
Morita Tomoko,
Kanai Masanori,
Mogi Kazutaka,
Kikusui Takefumi
Publication year - 2014
Publication title -
developmental psychobiology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.055
H-Index - 93
eISSN - 1098-2302
pISSN - 0012-1630
DOI - 10.1002/dev.21141
Subject(s) - period (music) , distress , psychology , maternal deprivation , physiology , medicine , endocrinology , chronic stress , developmental psychology , clinical psychology , physics , acoustics
Endocrinological stress response has been shown to be absent in a specific period of the early life of rodents; this is named the stress‐hyporesponsive period (SHRP). The SHRP is a significant period for the appropriate development of infants. In this study, the presence of SHRP in dogs was identified by conducting a 5‐min separation test in 142 Labrador retriever puppies in their early socialization period and measuring the changes in urinary cortisol levels. An increase in cortisol after separation was found after 5 weeks of age, suggesting that the SHRP persists until 4 weeks of age in dogs. The distress vocalization during separation changed and the lactating behavior decreased rapidly around 5 weeks of age, suggesting that the endocrinological and emotional aspects of development change at approximately 5 weeks of age and maternal inhibition of cortisol might occur in dogs as well as rodents . © 2013 Wiley Periodicals, Inc . Dev Psychobiol 56: 726–733, 2014.